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Hi guys, I'm looking for a little advice on preparing a big block of matrix containing at least two trimerorhachis skulls and other bone material. I'm completely new to fossil preparation and I've never attempted anything like this before, but I purchased this a number of years ago and it's been sitting in a box ever since - the idea of starting it has been too daunting until now. I really have no idea where to begin, so I was hoping for some tips on how to go about this. It's a very sold block of matrix, and I doubt I'd get very far with simple hand tools such as a scalpel. I've heard acid prep is used for some of these Permian fossils and wonder if this might be the way to go. If anyone could point me in the right direction it would be much appreciated

I found this in west Texas, in the Red Bed area. I was wondering if it could be an amphibian skull fossil of some kind. Maybe a trimerorhachis? I'm still learning about the extinct amphibians and reptiles in my state. Any suggestions are welcome!

Hi, I recently bought this online and it was listed as a Trimerorhachis Insignis tooth from Jefferson County, Oklahoma. After comparing it with other images I think this could be a claw and not a tooth, but I'm not 100% certain... Could anyone please confirm if it is? Thanks, Billly.

In a recent post by KYAL http://www.thefossilforum.com/index.php?/topic/46403-new-mexico-and-oklahoma-microfossils/ were some Permian teeth from Waurika Oklahoma that MarcoSr identified as Trimerorhachis insignis, a Permian Labyrinthodont amphibian. When I saw the teeth I immediately thought they were ray-finned fish because I saw an acrodin cap on the tip of the teeth, something only ray-finned fish have. After some discussion, Marco Sr. offered to send me some teeth to cut and polish because Labyrinthodont teeth have a characteristic infolding of the enamel that only primitive amphibians and some lobe-finned fish have. A few days later I received the teeth. They are so tiny I had to embed them in expoxy in order to work with them. I used soda straws filled with expoxy and lowered the teeth in with coffee stirrers. When properly cured, I used various grit sandpaper to cut through the teeth and polish them. When completed I attached them to a glass slide with epoxy in order to examine them and to photograph them. The results- Three of the teeth showed no signs of enamel infolding but the fourth tooth did. All the teeth looked identicle so if one is amphibian they all are. The reason the others didn't show the infolding could be that I cut the wrong area of the tooth or some teeth might be from immature individuals that don't show this characteristic. So MarcoSr was correct in his identification.

Hello all, I wanted to ask if someone has a good picture of the hindlimbs of Trimerorhachis (or a good big photo of the whole skeleton). I want to find out how much the bones in that species differ in each individual. (yes this is still about those bones in the Bones Permian Texas topic of mine) Thanks in advance, Greetings, Sander